Surface decarburization test of 30CrMo wear-resistant plate
30CrMo wear-resistant plate has the characteristics of high strength and hardness, good toughness, hardenability and machining performance. It is currently widely used in making cutting saw blade substrates. Decarburization will affect the surface quality, hardness, fatigue strength and other properties of the workpiece. The surface decarburization of the wear-resistant plate must be strictly controlled during the production process. The decarburization process is mainly affected by factors such as heating temperature, holding time, furnace atmosphere, and chemical composition of the wear-resistant plate. In the production of CSP process, decarburization phenomenon mainly occurs in the soaking furnace, and the decarbonization problem in the soaking furnace will be directly related to subsequent rolling forming processes and product quality.
Scientific researchers simulated the heating conditions of the CSP process in the laboratory, tested the 30CrMo wear-resistant plate, measured the thickness of the decarburization layer using the metallographic method, estimated the oxide layer thickness of the 30CrMo wear-resistant plate using the weight loss method, and studied the oxidation burning loss. The influence of heating temperature and holding time on the actual decarburization layer thickness of 30CrMo wear-resistant plate.
The results show that when the test atmosphere is (volume fraction, %) CO216.5, O20.8, H2O13, N269.7, and the heating temperature range is 1000~1150℃, the actual decarburization layer thickness of the 30CrMo wear-resistant plate increases with the heating The thickness of the decarburization layer increases with the increase of time. When it is lower than 1050°C, the thickness of the decarburization layer increases with the increase of temperature. When it is higher than 1050°C, the thickness of the decarburization layer decreases due to the intensification of oxidation. 1050°C is the sensitive temperature for decarburization.
